核心定位与应用
硬件与接口配置
通信与控制功能
制造与环境标准

Core positioning and application
The Multilin 850 is designed for primary or backup protection of overhead or underground medium voltage feeders. Although you mentioned 'motor protection', this series usually covers multiple medium voltage protection functions, and the specific details need to be based on the actual equipment manual.
Hardware and interface configuration
Front panel: equipped with full-color GCP (graphical control panel), convenient for users to read key measurement values; There are navigation keys, LED status indicators, and a front USB port located below the panel for easy connection.
Rear panel: Provides rich interface access, including digital I/O, analog I/O, CT and VT inputs, fiber ports, power modules, as well as serial and RJ45 Ethernet modules.
System specifications: Typically a 5A system, designed with a 5A three-phase current input and a ground input; The rated power supply voltage is 110-250 VDC or 110-230 VAC.
Communication and control functions
Communication protocol: Supports Modbus RTU, TCP/IP communication, as well as IEC 61850 and IEC 62439/PRP standards.
Control logic: Built in advanced control functions such as cold load picking, automatic conversion scheme, and automatic reclosing.
Diagnosis and maintenance: Equipped with advanced diagnostic capabilities, status monitoring, and preventive maintenance reporting functions.
Manufacturing and Environmental Standards
Adopting a standard strict conformal coating that complies with IPC A-610-E Level 3 manufacturing standards.
The protection level reaches IP54.
Adopting an electrolytic capacitor power supply design and supporting on-site plug and play for easy maintenance.





